27727985663 has 8 divisors (see below), whose sum is σ = 31749721728. Its totient is φ = 23721398424.

The previous prime is 27727985657. The next prime is 27727985693. The reversal of 27727985663 is 36658972772.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 27727985663 - 2⁴ = 27727985647 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27727985596 and 27727985605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27727985693) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3783281 + ... + 3790602.

It is an arithmetic number, because the mean of its divisors is an integer number (3968715216).

Almost surely, 2^27727985663 is an apocalyptic number.

27727985663 is a deficient number, since it is larger than the sum of its proper divisors (4021736065).

27727985663 is an equidigital number, since it uses as much as digits as its factorization.

27727985663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7574413.

The product of its digits is 53343360, while the sum is 62.

The spelling of 27727985663 in words is "twenty-seven billion, seven hundred twenty-seven million, nine hundred eighty-five thousand, six hundred sixty-three".